PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-02:27:50
G01     320.0          15.2               -5.0 +/-   36.42     -12.4 +/-   36.42  0.110 / 0.340
G08     258.6          14.8               11.3 +/-    1.79      28.3 +/-    1.79  0.140 / 0.330
G10     74.8           54.7                9.5 +/-    0.24      11.4 +/-    0.24  0.160 / 0.500
G11     305.1          22.2                8.7 +/-    1.53      18.1 +/-    1.53  0.160 / 0.450
G14     284.7          69.1               10.3 +/-    0.73      11.0 +/-    0.73  0.030 / 0.050
G18     307.3          38.2                8.4 +/-    2.20      12.6 +/-    2.20  0.030 / 0.070
G20     75.3           63.6               13.9 +/-    0.90      15.3 +/-    0.90  0.170 / 0.290
G27     226.5          10.9               10.9 +/-    3.96      29.8 +/-    3.96  0.170 / 0.300
G31     174.8          40.3               11.9 +/-    0.99      17.3 +/-    0.99  0.090 / 0.220
G32     5.7            68.6               10.8 +/-    0.43      11.5 +/-    0.43  0.090 / 0.230